<ul>
    <li><img src="http://www.bootcss.com/p/unslider/img/sunset.jpg" alt=""></li>
    <li><img src="http://www.bootcss.com/p/unslider/img/wood.jpg" alt=""></li>
    <li><img src="http://www.bootcss.com/p/unslider/img/shop.jpg" alt=""></li>
</ul>